Flask



FIG. 1 is a top front perspective view of a flask embodying the newdesign;

FIG. 2 is a front view of the flask of FIG. 1;

FIG. 3 is a rear view of the flask of FIG. 1;

FIG. 4 is a left side view of the flask of FIG. 1;

FIG. 5 is a right side view of the flask of FIG. 1;

FIG. 6 is a top view of the flask of FIG. 1; and,

FIG. 7 is bottom view of the flask of FIG. 1.

A cap assembly for the flask is shown in broken lines for illustrativepurposes only and forms no part of the claimed design.

CLAIM The ornamental design for a flask, as shown and described.